nextcloud / server

		// If they're not an admin, check they are a subadmin of the group in question

		$loggedInUser = $this->userSession->getUser();

		$subAdminManager = $this->groupManager->getSubAdmin();

		if (!$this->groupManager->isAdmin($loggedInUser->getUID()) && !$subAdminManager->isSubAdminOfGroup($loggedInUser, $group)) {

			throw new OCSException('', 104);

		}

		// Add user to group

		$group->addUser($targetUser);

		// If they're not an admin, check they are a subadmin of the group in question

		$subAdminManager = $this->groupManager->getSubAdmin();

		if (!$this->groupManager->isAdmin($loggedInUser->getUID()) && !$subAdminManager->isSubAdminOfGroup($loggedInUser, $group)) {

			throw new OCSException('', 104);

		}

		// Check they aren't removing themselves from 'admin' or their 'subadmin; group

		if ($userId === $loggedInUser->getUID()) {